<template>
  <div>
    <div v-clickoutside="hideReplyBtn" @click="inputFocus" class="my-reply">
      <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
      <div class="reply-info">
        <div
          tabindex="0"
          contenteditable="true"
          id="replyInput"
          spellcheck="false"
          placeholder="输入评论..."
          class="reply-input"
          @focus="showReplyBtn"
          @input="onDivInput($event)"
        ></div>
      </div>
      <div class="reply-btn-box" v-show="btnShow">
        <el-button
          class="reply-btn"
          size="medium"
          @click="sendComment"
          type="primary"
        >
          发表评论
        </el-button>
      </div>
    </div>
    <div
      v-for="(item, i) in comments"
      :key="i"
      class="author-title reply-father"
    >
      <el-avatar class="header-img" :size="40" :src="item.avatar"></el-avatar>
      <div class="author-info">
        <span class="author-name">{{ item.uname }}</span>
        <span class="author-time">{{ item.time }}</span>
      </div>
      <div class="icon-btn">
        <span @click="showReplyInput(i, item.uname, item.id)">
          <i class="iconfont el-icon-s-comment"></i>
          {{ item.commentNum }}
        </span>
        <i class="iconfont el-icon-caret-top"></i>
        {{ item.like }}
      </div>
      <div class="talk-box">
        <p>
          <span class="reply">{{ item.comment }}</span>
        </p>
      </div>
      <div class="reply-box">
        <div v-for="(reply, j) in item.children" :key="j" class="author-title">
          <el-avatar
            class="header-img"
            :size="40"
            :src="reply.avatar"
          ></el-avatar>
          <div class="author-info">
            <span class="author-name">{{ reply.uname }}</span>
            <span class="author-time">{{ reply.time }}</span>
          </div>
          <div class="icon-btn">
            <span @click="showReplyInput(i, reply.uname, reply.id)">
              <i class="iconfont el-icon-s-comment"></i>
              {{ reply.commentNum }}
            </span>
            <i class="iconfont el-icon-caret-top"></i>
            {{ reply.like }}
          </div>
          <div class="talk-box">
            <p>
              <span>回复 {{ reply.to }}:</span>
              <span class="reply">{{ reply.comment }}</span>
            </p>
          </div>
          <div class="reply-box"></div>
        </div>
      </div>
      <div v-show="_inputShow(i)" class="my-reply my-comment-reply">
        <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
        <div class="reply-info">
          <div
            tabindex="0"
            contenteditable="true"
            spellcheck="false"
            placeholder="输入评论..."
            @input="onDivInput($event)"
            class="reply-input reply-comment-input"
          ></div>
        </div>
        <div class="reply-btn-box">
          <el-button
            class="reply-btn"
            size="medium"
            @click="sendCommentReply(i, j)"
            type="primary"
          >
            发表评论
          </el-button>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
const clickoutside = {
  // 初始化指令
  bind(el, binding, vnode) {
    function documentHandler(e) {
      // 这里判断点击的元素是否是本身，是本身，则返回
      if (el.contains(e.target)) {
        return false
      }
      // 判断指令中是否绑定了函数
      if (binding.expression) {
        // 如果绑定了函数 则调用那个函数，此处binding.value就是handleClose方法
        binding.value(e)
      }
    }
    // 给当前元素绑定个私有变量，方便在unbind中可以解除事件监听
    el.vueClickOutside = documentHandler
    document.addEventListener('click', documentHandler)
  },
  update() {},
  unbind(el, binding) {
    // 解除事件监听
    document.removeEventListener('click', el.vueClickOutside)
    delete el.vueClickOutside
  },
}
export default {
  name: 'Comment',
  data() {
    return {
      btnShow: false,
      index: '0',
      replyComment: '',
      myName: 'Lana Del Rey',
      myHeader:
        'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
      myId: 19870621,
      to: '',
      toId: -1,
      comments: [
        {
          uname: 'Lana Del Rey',
          id: 19870621,
          avatar:
            'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
          comment: '我发布一张新专辑Norman Fucking Rockwell,大家快来听啊',
          time: '2019年9月16日 18:43',
          commentNum: 2,
          like: 15,
          inputShow: false,
          children: [
            {
              uname: 'Taylor Swift',
              id: 19891221,
              avatar:
                'https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg',
              to: 'Lana Del Rey',
              toId: 19870621,
              comment: '我很喜欢你的新专辑！！',
              time: '2019年9月16日 18:43',
              commentNum: 1,
              like: 15,
              inputShow: false,
            },
            {
              uname: 'Ariana Grande',
              id: 1123,
              avatar:
                'https://ae01.alicdn.com/kf/Hf6c0b4a7428b4edf866a9fbab75568e6U.jpg',
              to: 'Lana Del Rey',
              toId: 19870621,
              comment: '别忘记宣传我们的合作单曲啊',
              time: '2019年9月16日 18:43',
              commentNum: 0,
              like: 5,
              inputShow: false,
            },
          ],
        },
        {
          uname: 'Taylor Swift',
          id: 19891221,
          avatar:
            'https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg',
          comment: '我发行了我的新专辑Lover',
          time: '2019年9月16日 18:43',
          commentNum: 1,
          like: 5,
          inputShow: false,
          children: [
            {
              uname: 'Lana Del Rey',
              id: 19870621,
              avatar:
                'https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg',
              to: 'Taylor Swift',
              toId: 19891221,
              comment: '新专辑和speak now 一样棒！',
              time: '2019年9月16日 18:43',
              commentNum: 25,
              like: 5,
              inputShow: false,
            },
          ],
        },
        {
          uname: 'Norman Fucking Rockwell',
          id: 20190830,
          avatar:
            'https://ae01.alicdn.com/kf/Hdd856ae4c81545d2b51fa0c209f7aa28Z.jpg',
          comment: 'Plz buy Norman Fucking Rockwell on everywhere',
          time: '2019年9月16日 18:43',
          commentNum: 0,
          like: 5,
          inputShow: false,
          children: [],
        },
      ],
    }
  },
  directives: { clickoutside },
  methods: {
    inputFocus() {
      var replyInput = document.getElementById('replyInput')
      replyInput.style.padding = '8px 8px'
      replyInput.style.border = '2px solid blue'
      replyInput.focus()
    },
    showReplyBtn() {
      this.btnShow = true
    },
    hideReplyBtn() {
      this.btnShow = false
      replyInput.style.padding = '10px'
      replyInput.style.border = 'none'
    },
    showReplyInput(i, uname, id) {
      this.comments[this.index].inputShow = false
      this.index = i
      this.comments[i].inputShow = true
      this.to = uname
      this.toId = id
    },
    _inputShow(i) {
      return this.comments[i].inputShow
    },
    sendComment() {
      if (!this.replyComment) {
        this.$message({
          showClose: true,
          type: 'warning',
          message: '评论不能为空',
        })
      } else {
        let a = {}
        let input = document.getElementById('replyInput')
        let timeNow = new Date().getTime()
        let time = this.dateStr(timeNow)
        a.uname = this.myName
        a.comment = this.replyComment
        a.avatar = this.myHeader
        a.time = time
        a.commentNum = 0
        a.like = 0
        this.comments.push(a)
        this.replyComment = ''
        input.innerHTML = ''
      }
    },
    sendCommentReply(i, j) {
      if (!this.replyComment) {
        this.$message({
          showClose: true,
          type: 'warning',
          message: '评论不能为空',
        })
      } else {
        let a = {}
        let timeNow = new Date().getTime()
        let time = this.dateStr(timeNow)
        a.uname = this.myName
        a.to = this.to
        a.avatar = this.myHeader
        a.comment = this.replyComment
        a.time = time
        a.commentNum = 0
        a.like = 0
        this.comments[i].reply.push(a)
        this.replyComment = ''
        document.getElementsByClassName('reply-comment-input')[i].innerHTML = ''
      }
    },
    onDivInput: function (e) {
      this.replyComment = e.target.innerHTML
    },
    dateStr(date) {
      //获取js 时间戳
      var time = new Date().getTime()
      //去掉 js 时间戳后三位，与php 时间戳保持一致
      time = parseInt((time - date) / 1000)
      //存储转换值
      var s
      if (time < 60 * 10) {
        //十分钟内
        return '刚刚'
      } else if (time < 60 * 60 && time >= 60 * 10) {
        //超过十分钟少于1小时
        s = Math.floor(time / 60)
        return s + '分钟前'
      } else if (time < 60 * 60 * 24 && time >= 60 * 60) {
        //超过1小时少于24小时
        s = Math.floor(time / 60 / 60)
        return s + '小时前'
      } else if (time < 60 * 60 * 24 * 30 && time >= 60 * 60 * 24) {
        //超过1天少于30天内
        s = Math.floor(time / 60 / 60 / 24)
        return s + '天前'
      } else {
        //超过30天ddd
        var date = new Date(parseInt(date))
        return (
          date.getFullYear() +
          '/' +
          (date.getMonth() + 1) +
          '/' +
          date.getDate()
        )
      }
    },
  },
}
</script>

<style lang="stylus" scoped>
.my-reply
    padding 10px
    background-color #fafbfc
    .header-img
        display inline-block
        vertical-align top
    .reply-info
        display inline-block
        margin-left 5px
        width 90%
        @media screen and (max-width:1200px) {
            width 80%
        }
        .reply-input
            min-height 20px
            line-height 22px
            padding 10px 10px
            color #ccc
            background-color #fff
            border-radius 5px
            &:empty:before
                content attr(placeholder)
            &:focus:before
                content none
            &:focus
                padding 8px 8px
                border 2px solid blue
                box-shadow none
                outline none
    .reply-btn-box
        height 25px
        margin 10px 0
        .reply-btn
            position relative
            float right
            margin-right 15px
.my-comment-reply
    margin-left 50px
    .reply-input
        width flex
.author-title:not(:last-child)
    border-bottom: 1px solid rgba(178,186,194,.3)
.author-title
    padding 10px
    .header-img
        display inline-block
        vertical-align top
    .author-info
        display inline-block
        margin-left 5px
        width 60%
        height 40px
        line-height 20px
        >span
            display block
            cursor pointer
            overflow hidden
            white-space nowrap
            text-overflow ellipsis
        .author-name
            color #000
            font-size 18px
            font-weight bold
        .author-time
            font-size 14px
    .icon-btn
        width 30%
        padding 0 !important
        float right
        @media screen and (max-width : 1200px){
            width 20%
            padding 7px
        }
        >span
            cursor pointer
        .iconfont
            margin 0 5px
    .talk-box
        margin 0 50px
        >p
           margin 0
        .reply
            font-size 16px
            color #000
    .reply-box
        margin 10px 0 0 50px
        background-color #efefef
</style>
